Datasheet LTC3419 (Analog Devices) - 3
| 制造商 | Analog Devices |
| 描述 | Dual Monolithic 600mA Synchronous Step-Down Regulator |
| 页数 / 页 | 16 / 3 — ELECTRICAL CHARACTERISTICS. The. denotes the specifi cations which apply … |
| 文件格式/大小 | PDF / 264 Kb |
| 文件语言 | 英语 |
ELECTRICAL CHARACTERISTICS. The. denotes the specifi cations which apply over the full operating
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LTC3419
ELECTRICAL CHARACTERISTICS The
●
denotes the specifi cations which apply over the full operating junction temperature range, otherwise specifi cations are at TA = 25°C, VIN = 3.6V, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN VIN Operating Voltage ● 2.5 5.5 V VUV VIN Undervoltage Lockout VIN Low to High ● 2.1 2.5 V IFB Feedback Pin Input Current LTC3419 ● ±30 nA LTC3419-1 ● 3 5 μA VFBREG1 Regulated Feedback Voltage (Channel 1) LTC3419E, 0°C < TJ < 85°C 0.590 0.600 0.610 V LTC3419E, –40°C < TJ < 85°C ● 0.588 0.600 0.612 V LTC3419E-1, –40°C < TJ < 85°C ● 1.544 1.575 1.606 V LTC3419I, –40°C < TJ < 125°C ● 0.582 0.6 0.618 V LTC3419I-1, –40°C < TJ < 125°C ● 1.533 1.575 1.617 V VFBREG2 Regulated Feedback Voltage (Channel 2) LTC3419E, 0°C < TJ < 85°C 0.590 0.600 0.610 V LTC3419E, –40°C < TJ < 85°C ● 0.588 0.600 0.612 V LTC3419E-1, –40°C < TJ < 85°C ● 1.764 1.8 1.836 V LTC3419I, –40°C < TJ < 125°C ● 0.582 0.6 0.618 V LTC3419I-1, –40°C < TJ < 125°C ● 1.753 1.8 1.847 V ΔVLINE REG Reference Voltage Line Regulation VIN = 2.5V to 5.5V (Note 7) 0.3 0.5 %/V ΔVLOAD REG Output Voltage Load Regulation ILOAD = 0mA to 600mA (Note 7) 0.5 % IS Input DC Supply Current Active Mode (Note 4) VFB1 = VFB2 = 0.95 × VFBREG 500 700 μA Sleep Mode VFB1 = VFB2 = 1.05 × VFBREG, VIN = 5.5V 35 60 μA Shutdown RUN1 = RUN2 = 0V, VIN = 5.5V 0.1 1 μA fOSC Oscillator Frequency VFB = VFBREG ● 1.8 2.25 2.7 MHz ILIM Peak Switch Current Limit VIN = 3V, VFB < VFBREG, Duty Cycle < 35% Channel 1 (600mA) 900 1200 mA Channel 2 (600mA) 900 1200 mA RDS(ON) Channel 1 (Note 5) Top Switch On-Resistance VIN = 3.6V, ISW = 100mA 0.4 0.6 Ω Bottom Switch On-Resistance VIN = 3.6V, ISW = 100mA 0.4 0.6 Ω Channel 2 (Note 5) Top Switch On-Resistance VIN = 3.6V, ISW = 100mA 0.4 0.6 Ω Bottom Switch On-Resistance VIN = 3.6V, ISW = 100mA 0.4 0.6 Ω ISW(LKG) Switch Leakage Current VIN = 5V, VRUN = 0V 0.01 1 μA tSOFTSTART Soft-Start Time VFB from 10% to 90% Full Scale 0.1 0.95 1.3 ms VRUN RUN Threshold High ● 0.4 1 1.2 V IRUN RUN Leakage Current ● 0.01 1 μA VMODE MODE Threshold High ● 0.4 1 1.2 V IMODE MODE Leakage Current ● 0.01 1 μA VBURST Output Ripple in Burst Mode Operation VOUT = 1.5V, COUT = 10μF 20 mVP-P
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 4:
Dynamic supply current is higher due to the internal gate charge may cause permanent damage to the device. Exposure to any Absolute being delivered at the switching frequency. Maximum Rating condition for extended periods may affect device
Note 5:
The DFN switch on-resistance is guaranteed by correlation to reliability and lifetime. wafer level measurements.
Note 2:
Guaranteed by long term current density limitations.
Note 6:
This IC includes overtemperature protection that is intended
Note 3:
The LTC3419E and LTC3419E-1 are guaranteed to meet specifi ed to protect the device during momentary overload conditions. Junction performance from 0°C to 85°C. Specifi cations over the –40°C to 125°C temperature will exceed 125°C when overtemperature protection is active. operating junction temperature range are assured by design, Continuous operation above the specifi ed maximum operating junction characterization and correlation with statistical process controls. The temperature may impair device reliability. LTC3419I and LTC3419I-1 are guaranteed to meet specifi ed performance
Note 7:
The converter is tested in a proprietary test mode that connects over the full –40°C to 125°C operating junction temperature range. the output of the error amplifi er to the SW pin, which is connected to an external servo loop. 3419fa 3
ELECTRICAL CHARACTERISTICS The
●
denotes the specifi cations which apply over the full operating junction temperature range, otherwise specifi cations are at TA = 25°C, VIN = 3.6V, unless otherwise noted. SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN VIN Operating Voltage ● 2.5 5.5 V VUV VIN Undervoltage Lockout VIN Low to High ● 2.1 2.5 V IFB Feedback Pin Input Current LTC3419 ● ±30 nA LTC3419-1 ● 3 5 μA VFBREG1 Regulated Feedback Voltage (Channel 1) LTC3419E, 0°C < TJ < 85°C 0.590 0.600 0.610 V LTC3419E, –40°C < TJ < 85°C ● 0.588 0.600 0.612 V LTC3419E-1, –40°C < TJ < 85°C ● 1.544 1.575 1.606 V LTC3419I, –40°C < TJ < 125°C ● 0.582 0.6 0.618 V LTC3419I-1, –40°C < TJ < 125°C ● 1.533 1.575 1.617 V VFBREG2 Regulated Feedback Voltage (Channel 2) LTC3419E, 0°C < TJ < 85°C 0.590 0.600 0.610 V LTC3419E, –40°C < TJ < 85°C ● 0.588 0.600 0.612 V LTC3419E-1, –40°C < TJ < 85°C ● 1.764 1.8 1.836 V LTC3419I, –40°C < TJ < 125°C ● 0.582 0.6 0.618 V LTC3419I-1, –40°C < TJ < 125°C ● 1.753 1.8 1.847 V ΔVLINE REG Reference Voltage Line Regulation VIN = 2.5V to 5.5V (Note 7) 0.3 0.5 %/V ΔVLOAD REG Output Voltage Load Regulation ILOAD = 0mA to 600mA (Note 7) 0.5 % IS Input DC Supply Current Active Mode (Note 4) VFB1 = VFB2 = 0.95 × VFBREG 500 700 μA Sleep Mode VFB1 = VFB2 = 1.05 × VFBREG, VIN = 5.5V 35 60 μA Shutdown RUN1 = RUN2 = 0V, VIN = 5.5V 0.1 1 μA fOSC Oscillator Frequency VFB = VFBREG ● 1.8 2.25 2.7 MHz ILIM Peak Switch Current Limit VIN = 3V, VFB < VFBREG, Duty Cycle < 35% Channel 1 (600mA) 900 1200 mA Channel 2 (600mA) 900 1200 mA RDS(ON) Channel 1 (Note 5) Top Switch On-Resistance VIN = 3.6V, ISW = 100mA 0.4 0.6 Ω Bottom Switch On-Resistance VIN = 3.6V, ISW = 100mA 0.4 0.6 Ω Channel 2 (Note 5) Top Switch On-Resistance VIN = 3.6V, ISW = 100mA 0.4 0.6 Ω Bottom Switch On-Resistance VIN = 3.6V, ISW = 100mA 0.4 0.6 Ω ISW(LKG) Switch Leakage Current VIN = 5V, VRUN = 0V 0.01 1 μA tSOFTSTART Soft-Start Time VFB from 10% to 90% Full Scale 0.1 0.95 1.3 ms VRUN RUN Threshold High ● 0.4 1 1.2 V IRUN RUN Leakage Current ● 0.01 1 μA VMODE MODE Threshold High ● 0.4 1 1.2 V IMODE MODE Leakage Current ● 0.01 1 μA VBURST Output Ripple in Burst Mode Operation VOUT = 1.5V, COUT = 10μF 20 mVP-P
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
Note 4:
Dynamic supply current is higher due to the internal gate charge may cause permanent damage to the device. Exposure to any Absolute being delivered at the switching frequency. Maximum Rating condition for extended periods may affect device
Note 5:
The DFN switch on-resistance is guaranteed by correlation to reliability and lifetime. wafer level measurements.
Note 2:
Guaranteed by long term current density limitations.
Note 6:
This IC includes overtemperature protection that is intended
Note 3:
The LTC3419E and LTC3419E-1 are guaranteed to meet specifi ed to protect the device during momentary overload conditions. Junction performance from 0°C to 85°C. Specifi cations over the –40°C to 125°C temperature will exceed 125°C when overtemperature protection is active. operating junction temperature range are assured by design, Continuous operation above the specifi ed maximum operating junction characterization and correlation with statistical process controls. The temperature may impair device reliability. LTC3419I and LTC3419I-1 are guaranteed to meet specifi ed performance
Note 7:
The converter is tested in a proprietary test mode that connects over the full –40°C to 125°C operating junction temperature range. the output of the error amplifi er to the SW pin, which is connected to an external servo loop. 3419fa 3